Die for making eyelets



(ModeL) G. 0. SOHNELLER.

DIES FOR MAKING EYELET'S. No. 246,641. Patented Sept. 6,1881.

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IlNiTEn' STATES PATENT OFFICE- GEORGE O. SCHNELLER, OF ANSONIA, CONNECTICUT.

DIE FOR MAKING EYELETS.

SPECIFICATION forming part of Letters Patent No. 246,641 dated September 6, 1881,

Application filed January 26, 1881. (Model.)

To all whom it may concern:

Be it known that I, GEORGE O. ScHNnLLER, of Ansonia, in the county of New Haven and State of Connecticut, have invented a new Improvement in Dies for Making Eyelets; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a front view; Fig. 2, a longitudinal section; Fig. 3, a vertical section.

This invention relates to an improvement in devices for making eyelets, with special reference to the invention for which Letters Patent were granted to me November 23,1880, and in which several series of punches on the one part of the die and corresponding cavities in the other are employed in stamping the eyelets in the sheet, the several series acting together or simultaneously, in contradistinction to asingle row or series, as used prior to my invention.

In making eyelets by my improved method several successive operations are required in stamping from the sheet, the dies operating to simultaneously form, or partly form, several series. The strain upon the metal for each eyelet is counterbalanced by the strain on the adjacent eyelets, whereby uniformity in the density of the metal-the advantage of my invention-is attained.

In practicing my invention the first stamping forms, or partially forms, several series of eyelets, and then when the sheet is moved forward for the next stamping the last series previously stamped lies rigidly against the partial cavities ,in the die. Then when the second stamping is made it would naturally draw the metal of the preceding portion of the sheet back-- ward toward the adjacent series of depressions being formed; but as the bearing of the previously-made depressions is rigid against the die the metal cannot yield; hence there is a distress of metal at that point, causing the eyelets in the series at the edge of the dies to differ somewhat in their density from those of the interior series.

To avoid this difficulty is the object of this invention and it consists in constructing the die with a yielding support at-the edge of the die for the preceding series to lie against, so

that the metal between the last series of the impressions made may move toward the first series of the next several series made, and avoid the distress of metal which occurs from the rigid holding of the preceding series; and the invention consists in the construction as hereinafter described, and particularly recited in the claim.

The die A is prepared substantially as in my previous patent referred to, with the partial cavities a b at the edge of the die, substantially as in said patent, so that the last series of one stamping may rest in the said partial cavities. To that side of the die where these partial cavities are formed I arrange a section, B, attached to the die proper, and provided with a spring, C, between it and the die, the tendency of which is to force the section B away from the die proper to the extent which is permitted by the set-screws D, which secure the section B to the die A. The upper edge of this section B is in the same plane with the die, and is provided with partial cavities d 0, corresponding to the projections made by the depressions in the sheet, and so that the said projections will set therein.

In stamping the sheet, after one stamping the sheet is advanced until the last series of the previous stamping will rest in the partial cavities b, and the second in the partial cavities to, of thedie A, and the third series in the partial cavities d of the section B. On the inside of the section B partial cavities are made corresponding to the partial cavities a on the die; but the spring or adjustability of the section B is such that while the projections on the sheet bear directly against and take a solid bearing in the cavities d c in the section B,

those projections in the cavities a b of the die.

A will be slightly in advance, or so as not to take a firm bearing in those cavities. The result of this is, that the partial cavities in the section B locate the sheet with reference to the dies for the purpose of the second stroke of the dies; and when the dies come together upon the sheet the section B will yield and permit the metal to be drawn back toward the dies, substantially as it does in the body of the dies when supported entirely around the perforation, thus preventing the distress of metal which necessarily occurs when it is rigidly held.

The section B is adjustable by the set-screws D to a position nearer to or farther from the dies, so that the setting of the sheet for the stampings succeeding the first may be regulated, and so that the necessary yielding of the previously-stamped portion may be had.

It will be evident to those skilled in this art that the punches, or that part of the die on which are the projections, may be placed below and the depressions above. In that case the yielding, or adjustable section must be placed beside the die having the projections, and in being so placed it must be provided with projections corresponding to the projections on the lower part of the die or, in other words, the dies will be inverted or reversed in their operations. In either case the adj ustable portion must be arranged in connection with the lower or stationary part of the dies; but I prefer, and in practice it is better, that the dies having depressions shall be below, as before described.

I claim- The hereindescribed improvement in dies for making eyelets, consisting in combining with the stationary part of the dies a section adjustable or yielding in relation to said dies, said section being provided with cavities or projections corresponding to the cavities or projections in said stationary dies, substantially as described.

GEO. O. SOHNELLER.

Witnesses:

JOHN E. EARLE, L. D. ROGERS. 

